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0. H. GILBERT. LOCK.

110.414,518, Patented Nov. 5, 1889.

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(No Model.) 2 Sheets-Sheet 2. OfH. GILBERT. LOCK.

No. 414,518. Patented Nov. 8, 1888.

WITNEssEs; n mvENTon: mi orveuasH/'izbeym UNITED STATES PATENT @Erica OlVlLllASll. GTL-BERT, OF NIVARK, NEVI JE lSlCY.

LOCK.

SPECIFICATION forming part of Letters Patent No. 414,518, dated November 5, 1889.

Application filed July 27, 1883. Serial No. 281,208. (No model.)

.To all 1071,0712.- 'it may concern:

lie it known that l, Oni/*ELLAS H. GILBERT, a citizen of the United States, residing at Newai k,in the county of Essex and State of New Jersey, have invented certain new and useful Improvements in Lookin g Devices for Doors; andl do hereby declare the following to be a ull, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the saine, reference being had to the accompanying drawings, and to letters of reference marked thereon, which form a part of this specification.

This invention relates to improvements in locking devices for doors, and is designed to provide a lock which is adapted to take the place ot' the ordinary rim-and-mortise locks for thin doors, and which also is cheaper and more simple in construction than the ordinary i'ini-locl;,and, further, more ornamental in appearance.

As shown in the drawings, Figure l isa front elevation of the lock-con taining escutchcon and rose-plate secured to a door, the knobspindle being shown in cross-section. is a back view of the same, showing the locking-arm on the knob-spindle engaging with the bolt-locking mechanism. Figs. 3 and 4 are cross-sections of the lock in its locked and unlocked positions, respectively. Fig. 5 is a section taken through line af, Fig. et; and Fig. G is a view similar to Fig. i, part of the escutcheon lock-containing Casin g being broken away, showing the position of the lockingarm when the door-knob has been turned either to the right or left. Fig. 7 is a perspective view of the locking-arm, and Fig. S is aviewof a modification of the locking arm and bolt.

In the drawings, A represents the eseutchcon, B the rose-plate, and C the shank, all cast in one piece, as illustrated, said escutchcon and rose-plate forming a casing for the bolt-operating mechanism, and which is secured to the outside of the door, as indicated in Fig. 1.

W'ithin the depression a in the escutcheonplate A is the bolt-operating mechanism D, which may be ot' any known construction, and through the rose-plate B passes the knobspindlc E, to which is attached the locking- Fig. 24

arm e, arranged in the rose-plate, and which operates a small inortise latch-bolt l?, of any well-known construction.

As indicated in Figs. 2 and 3, the bolt-op erating mechanism is provided with a lool;- ing-bolt d, having tongues or projections d d thereon, forming a recess d2, into which entends the end e ot the locking-arm e, scoured to the spindle E. lVhen the lockingbolt (l has been withdrawn to the position indicated in Fig. Ll, by means of a key, thc arm e can be turned to either side, as indicated in Fig. 6, by turning the spindle to which the same is secured.

As shown more especiallyT in Figs. 3 and e, the means for operating the bolt d consists of a spring-actuated tumbler D', which detains the bolt d in place until said tumbler, which engages with a stop or projection di", as shown, is released from the stop by means ot a key, therebyT allowing the bolt to be thrown .out' of engagement with the locking-arm e on the spindle.

Vhen the parts in the lock are in their normal state and the bolt il is in lo'liing engagement with the arm e on the spindle, a spring di forces the tumbler D over and causes the engagement of the stop or post d5 on the bolt with a recess d in the opening in the tumbler, as will be understood from Finn 3, thereby causing the locked engagement of the arm e on the spindle with the recess d2 in the bolt until the tumbler D has been forced out of engagement with the stop d5 on the bolt, as indicated more especially in Fig. 4, bythe turning of the key, the tongue of which engages with a recess (7,5111 the bolt and thereby forces the latter out of engagement with the arm on the spindle, which may be turned either to the right or left, as maybe desirable.

In order that the end e of the arm e may readily enter into the recess (l2, said arm is chamfered at e2 and es, as are also the arms d at cl3 and d rlhe locking-arm e is provided with a square opening, in order that the same may be slipped on the spindle. Y

As shown in Fig. S, the arm e may be pro vided with tongues or projections, as will be understood. The great advantage derived from this arrangement is that a small niortiscdatch can be used, which is easily mortised into the door-stile without weakening the same, as the locking mechanism is all contained Within the escutcheon-plate.

As will be understood, the combined rose or spindle-holding plate and eseutcheon may be used on either side of the door. The knob on the outside of the door may be secured to the spindle by means of a pin or rivet; or the same may be secured thereto in any other Well-known manner.

I am aware that a locking-arm secured to the spindle of a lock has been used; but in the device to which reference is made said arm engages with a slide which is provided with a stem and is only brought into locking engagement with the arm on the spindle when pulled by means of a knob on the outside of the rose-plate. By causing the 'bolt mechanism in my construction to engage the locking-bolt with the arm on the spindle the construction and operation of the lock are greatly simplified and oheapened.

Another advantageous result in constructing and arranging the parts of my lock, as shown7 is that by my arrangement I avoid the use of an extra locking-bolt, and thereby the use of extra lock-iuortises in the door and the frame, which enables the lock Ato be firmly attached to the door.

Ilavng thus described my invention, what I claim isv y As an improved article of manufacture, a lock eonsistin g of a combined eseutcheon and rose-plate adapted to .be secured to a door, said combined escuteheon and rose-plate comprising therein a tumbler D', operated by a key and having an opening therein, a bolt (Z, provided with a post or stop (Z5, extending up therefrom and into the opening in the tumbler, said bolt CZ being provided With a recess (Z2, a spindle passing through'the roseplate and a mortised latch, a locking-arm on said spindle, turning with the same, projecting normally downward therefrom, and having an extension e', adapted to enter the recess (Z2 in the bolt CZ, a spring (Z7, adapted to engage with the tumbler D and causing the engagement of the post (Z5 with a recess CZVin the opening in the tumbler until released by means of the key, substantially as and for the purposes set forth.

In testimony that I claim the invention set forth above I have hereunto set my hand this th day of July, 1888.

ORVELLAS IT. GILBERT. XVit-nesses:

FREDK. C. FRAENTZEL, FREDK. S. RICE. 

